How to increase my heros healthpower using a potion? When my hero (Paladini, sorcerer, warrior) use a potion his healthpower should be increase. Java

Question

Increase hero health using a potion. For example if my paladin's health is 50, using a potion should be 60. They are 3 type of heroes, paladin, sorcerer, warrior. If i choose to play with paladin for example, i have the option to increase his power if its his turn.